Looks like you have a stray " ] " in your CF7 form after the Send button. You may have other problems as well, but I would eliminate that for a start.
Use Firebug or Chrome Dev Tools to examine the HTML and CSS of your CF7 form in detail. Once you understand how the HTML and CSS is configured in your CF7 form, you should be able to see the CSS changes you need to change the appearance of the form to suit your requirements.